/*
* Open function for PFAT filesystems.
*/
static int PFAT_Open(struct Mount_Point *mountPoint, const char *path, int mode, struct File **pFile)
{
int rc = 0;
struct PFAT_Instance *instance = (struct PFAT_Instance*) mountPoint->fsData;
directoryEntry *entry;
struct PFAT_File *pfatFile = 0;
struct File *file = 0;
int i = 0;
/* Reject attempts to create or write */
if ((mode & (O_WRITE | O_CREATE)) != 0)
return EACCESS;
/* Look up the directory entry */
entry = PFAT_Lookup(instance, path);
if (entry == 0)
return ENOTFOUND;
/* Make sure the entry is not a directory. */
if (entry->directory)
return EACCESS;
/* Get PFAT_File object */
pfatFile = Get_PFAT_File(instance, entry);
if (pfatFile == 0)
goto done;
/* Create the file object. */
file = Allocate_File(&s_pfatFileOps, 0, entry->fileSize, pfatFile, mode, mountPoint);
if (file == 0) {
rc = ENOMEM;
goto done;
}
/* Success! */
*pFile = file;
// Error: I have to fix this to let pfat work with the standard syscalls;
if (g_currentThread->userContext != 0)
{
for(i = 0; i < GOSFS_NUM_DIR_ENTRY; i++)
{ if(g_currentThread->userContext->fileList[i] == 0) break; }
g_currentThread->userContext->fileList[i] = file;
rc = i;
Debug("gosfs open rc:%d\n", rc);
g_currentThread->userContext->fileCount++;
}
done:
return rc;
}
/*
* If the given PFAT instance has a paging file,
* register it as the paging device, unless a paging device
* has already been registered.
*/
static void PFAT_Register_Paging_File(struct Mount_Point *mountPoint, struct PFAT_Instance *instance)
{
directoryEntry *pagefileEntry;
struct Paging_Device *pagedev = 0;
size_t nameLen;
char *fileName = 0;
if (Get_Paging_Device() != 0)
return; /* A paging device is already registered */
pagefileEntry = PFAT_Lookup(instance, PAGEFILE_FILENAME);
if (pagefileEntry == 0)
return; /* No paging file in this filesystem */
/* TODO: verify that paging file is contiguous */
/* Create Paging_Device object. */
pagedev = (struct Paging_Device*) Malloc(sizeof(*pagedev));
if (pagedev == 0)
goto memfail;
nameLen = strlen(mountPoint->pathPrefix) + strlen(PAGEFILE_FILENAME) + 3;
fileName = (char*) Malloc(nameLen);
if (fileName == 0)
goto memfail;
/* Format page filename */
snprintf(fileName, nameLen, "/%s%s", mountPoint->pathPrefix, PAGEFILE_FILENAME);
/* Initialize Paging_Device */
pagedev->fileName = fileName;
pagedev->dev = mountPoint->dev;
pagedev->startSector = pagefileEntry->firstBlock;
pagedev->numSectors = pagefileEntry->fileSize / SECTOR_SIZE;
/* Register it */
Register_Paging_Device(pagedev);
return;
memfail:
Print(" Error: could not create paging device for pfat on %s (%s)\n",
mountPoint->pathPrefix, mountPoint->dev->name);
if (pagedev != 0)
Free(pagedev);
if (fileName != 0)
Free(fileName);
}
/*
* Stat function for PFAT filesystems.
*/
static int PFAT_Stat(struct Mount_Point *mountPoint, const char *path, struct VFS_File_Stat *stat)
{
struct PFAT_Instance *instance = (struct PFAT_Instance*) mountPoint->fsData;
directoryEntry *entry;
KASSERT(path != 0);
KASSERT(stat != 0);
Debug("PFAT_Stat(%s)\n", path);
entry = PFAT_Lookup(instance, path);
if (entry == 0)
return ENOTFOUND;
Copy_Stat(stat, entry);
return 0;
}
/*
* Open function for PFAT filesystems.
*/
static int PFAT_Open(struct Mount_Point *mountPoint, const char *path, int mode, struct File **pFile)
{
int rc = 0;
struct PFAT_Instance *instance = (struct PFAT_Instance*) mountPoint->fsData;
directoryEntry *entry;
struct PFAT_File *pfatFile = 0;
struct File *file = 0;
/* Reject attempts to create or write */
if ((mode & (O_WRITE | O_CREATE)) != 0)
return EACCESS;
/* Look up the directory entry */
entry = PFAT_Lookup(instance, path);
if (entry == 0)
return ENOTFOUND;
/* Make sure the entry is not a directory. */
if (entry->directory)
return EACCESS;
/* Get PFAT_File object */
pfatFile = Get_PFAT_File(instance, entry);
if (pfatFile == 0)
goto done;
/* Create the file object. */
file = Allocate_File(&s_pfatFileOps, 0, entry->fileSize, pfatFile, 0, 0);
if (file == 0) {
rc = ENOMEM;
goto done;
}
/* Success! */
*pFile = file;
done:
return rc;
}
